/* CSS: Hacker-themed, frosted-glass, olive polka-dot, mobile-first */

*,
*::before,
*::after { box-sizing: border-box; }

html, body { height: 100%; }

:root {
  --olive: #3a5a2f;
  --olive-dark: #2b4218;
  --silver: #cbd7e8;
  --silver-dark: #93a4b8;
  --glass: rgba(255,255,255,.08);
  --glass-border: rgba(255,255,255,.25);
  --bg-shadow: rgba(0,0,0,.25);
  --glow: 0 0 14px rgba(210,232,255,.6);
}

body {
  margin: 0;
  padding: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial;
  color: #e9f0f6;
  background-color: var(--olive);
  /* olive polka dots pattern */
  background-image: radial-gradient(circle at 8px 8px, rgba(0,0,0,.14) 2px, transparent 3px);
  background-size: 40px 40px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  display: grid;
  place-items: center;
  padding: 2rem 1rem 1.5rem;
  min-height: 60vh;
}

.image-frame {
  width: min(92vw, 860px);
  border-radius: 16px;
  padding: 10px;
  background: rgba(255,255,255,.08); /* frosted glass base */
  border: 1px solid rgba(255,255,255,.25);
  box-shadow: 0 18px 40px var(--bg-shadow);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: transform .2s ease, box-shadow .3s ease;
}
.image-frame:hover {
  transform: translateY(-2px);
  box-shadow: 0 28px 50px rgba(0,0,0,.5);
}
.image-frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  /* subtle silver tint for cyberpunk vibe */
  filter: saturate(1.05) contrast(1.02);
  outline: 1px solid rgba(255,255,255,.15);
}

footer {
  padding: 2rem 1rem 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  background: rgba(15,23,42,.55);
  border-top: 1px solid rgba(255,255,255,.15);
}

.product-ad {
  display: inline-block;
  padding: .75rem 1rem;
  border-radius: 12px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.25);
  box-shadow: 0 8px 20px rgba(0,0,0,.25);
  text-align: left;
}
.product-ad h3 {
  margin: 0 0 .25rem;
  font-size: 1.05rem;
  color: #e9f0ff;
}
.product-ad a {
  display: inline-block;
  padding: .5rem 1rem;
  border-radius: 999px;
  text-decoration: none;
  background: linear-gradient(135deg, #d5e0f6 0%, #9fb6cc 100%);
  color: #0b111f;
  font-weight: 700;
  border: 1px solid rgba(0,0,0,.15);
  transition: transform .2s ease, box-shadow .2s ease;
}
.product-ad a:hover { transform: translateY(-1px); box-shadow: 0 6px 14px rgba(0,0,0,.25); }
.product-ad a:focus-visible { outline: 3px solid #fff; outline-offset: 2px; }

footer p {
  text-align: center;
  color: rgba(230,238,246,.8);
  margin: 0;
  font-size: .95rem;
}

/* Focus styles for accessibility on focusable controls */
a:focus-visible,
button:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 2px;
  border-radius: 6px;
}

/* Responsive tweaks */
@media (min-width: 600px) {
  main { padding: 3rem 1.5rem 2.5rem; }
  .image-frame { padding: 14px; }
}

@media (min-width: 1024px) {
  :root { --olive: #2f4324; } /* deeper olive for larger screens */
  body { background-image: radial-gradient(circle at 10px 10px, rgba(0,0,0,.12) 2px, transparent 3px); background-size: 52px 52px; }
  .image-frame { width: min(70vw, 920px); }
  footer { flex-direction: row; justify-content: center; gap: 2rem; }
}